CN217691481U - Battery pack and vehicle - Google Patents

Abstract

The utility model discloses a battery pack and a vehicle, the battery pack of the embodiment of the utility model comprises a lower box body, a plurality of battery cells and a bus bar, the battery cells are arranged in the lower box body, the battery cells comprise a battery cell body and a pole column connected with the battery cell body, and at least one part of the upper surface of the pole column forms a first connecting part; the busbar is provided with a plurality of second connecting parts, the second connecting parts correspond to the battery cells one by one, and the second connecting parts are electrically connected with the first connecting parts of the corresponding battery cells. The utility model discloses battery package has advantages such as bulk strength is good.

Description

Battery pack and vehicle

Technical Field

The utility model relates to a power battery technical field, concretely relates to battery package and vehicle.

Background

The battery package includes the box and establishes the electric core in the box, and the assembly process of battery package is roughly: firstly, stacking the battery cells in a lower box body of the box body; then electrically connecting the pole of the battery cell with the busbar; then the upper cover of the box body is covered on the lower box body. When the utmost point post of electric core and female the being connected of arranging, in order to reserve sufficient operating space, need do short with the frame relative with utmost point post of lower box, lead to the height inequality of each frame of box down, can influence the bulk strength of battery package from this.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving one of the technical problems in the related art at least to a certain extent.

Therefore, the embodiment of the utility model provides a battery package that intensity is good.

An embodiment of the utility model provides a vehicle that reliability is high.

The battery pack comprises a lower box body, a plurality of battery cells and a busbar, wherein the battery cells are arranged in the lower box body, each battery cell comprises a battery cell body and a pole connected with the battery cell body, and at least one part of the upper surface of each pole forms a first connecting part; the busbar is provided with a plurality of second connecting parts, the second connecting parts correspond to the battery cells one by one, and the second connecting parts are electrically connected with the first connecting parts of the corresponding battery cells.

The utility model discloses battery package has advantages such as bulk strength is good.

In some embodiments, the terminal post includes a first section and a second section, the first section is disposed closer to the cell body than the second section in a length direction of the cell body, a width of the second section is greater than a width of the first section, and an upper surface of the second section forms the first connection portion.

In some embodiments, the cell further comprises a cell casing and a cover plate assembly, the cell body being disposed within the cell casing;

the cover plate assembly is arranged on the battery cell shell and comprises a cover plate and a pole, one part of the first section is positioned in the cover plate, and the other part of the first section and the second section are both positioned outside the cover plate.

In some embodiments, the second segment includes a first portion and a second portion, the first portion is disposed on an upper side of the second portion, a width of the first portion is greater than a width of the second portion, a cross-section of the second segment has a T-shape, and an upper surface of the first portion forms the first connection portion.

In some embodiments, the first portions of two adjacent battery cells are staggered in an up-down direction, and the second connecting portions are staggered in an up-down direction.

In some embodiments, the busbar has a plurality of widened parts, the widened parts correspond to the second connection parts one by one, each widened part is arranged below the corresponding second connection part, and a longitudinal cross section of the busbar is in an inverted L shape.

In some embodiments, a first gap is formed between two adjacent second connecting parts; and/or

A second gap is formed between every two adjacent widened parts; and/or

A first buffer groove is arranged between every two adjacent second connecting parts; and/or

And a second buffer groove is arranged between every two adjacent widened parts.

In some embodiments, the battery pack further includes a slave control circuit board and a plurality of connecting members, the plurality of connecting members and the plurality of second connecting portions are in one-to-one correspondence, each connecting member has a third connecting portion electrically connected to the corresponding second connecting portion and a fourth connecting portion electrically connected to the slave control circuit board.

In some embodiments, a plurality of the connection members are arranged at intervals in a width direction of the cell body; and/or

The fourth connecting part is arranged below the third connecting part, and the longitudinal section of the connecting piece is in an inverted L shape.

The vehicle of the embodiment of the utility model comprises the battery pack of any one of the above embodiments.

The utility model discloses vehicle has advantages such as reliability height.

Drawings

Fig. 1 is an isometric view of a battery pack (upper cover not shown) according to an embodiment of the present invention.

Fig. 2 is a front view of a battery pack according to an embodiment of the present invention (upper cover not shown).

Fig. 3 isbase:Sub>A view frombase:Sub>A-base:Sub>A of fig. 2.

Fig. 4 is an exploded view of a battery pack according to an embodiment of the present invention (upper cover not shown).

Fig. 5 is an enlarged view at B in fig. 4.

Fig. 6 is a schematic structural diagram of the battery cell in fig. 4.

Fig. 7 is a partial structural schematic diagram of the battery cell in fig. 6.

Fig. 8 is a schematic view of the structure of the cover plate assembly of fig. 7.

Fig. 9 is a partial structural view of the busbar of fig. 4.

Fig. 10 is a schematic structural diagram of the slave control circuit board of fig. 4.

Fig. 11 is an enlarged view at C in fig. 10.

Fig. 12 is a schematic partial structural view of a battery cell of a battery pack according to another embodiment of the present invention.

Fig. 13 is an isometric view of a battery pack of yet another embodiment of the invention (upper cover not shown).

Fig. 14 is a schematic structural view of the lower case of fig. 13.

Reference numerals are as follows:

a battery pack 100;

a lower box body 1; a left frame 1011; the right frame 1012; a front frame 1013; a rear frame 1014; a base plate 102; a cross member 103; a first receiving chamber 104; a second accommodation chamber 105;

a battery core 2; a cell casing 201; a pole 202; a first connection portion 2021; a first section 2022; a first portion 20221; a second portion 20222; a second section 2023; a cover plate 203;

a busbar 3; a second connection portion 301; a widened portion 302; a first opening 303; a second gap 304; a second buffer tank 305;

a slave control circuit board 4;

a connecting member 5; a third connecting portion 501; a fourth connection portion 502.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are exemplary intended for explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1 to 14, a battery pack 100 according to an embodiment of the present invention includes a lower case 1, a plurality of battery cells 2, and a busbar 3. The battery cell 2 is arranged in the lower box body 1, the battery cell 2 includes a battery cell body and a pole 202 connected to the battery cell body, and at least a part of an upper surface of the pole 202 forms a first connection portion 2021. The busbar 3 has a plurality of second connection portions 301, the plurality of second connection portions 301 correspond to the plurality of battery cells 2 one by one, and the second connection portions 301 are electrically connected to the first connection portions 2021 of the corresponding battery cells 2.

The utility model discloses battery package 100, in adorning down the casing 1 back with electric core 2, when being connected female second connecting portion 301 of arranging 3 with the first connecting portion 2021 electricity of utmost point post 202, because first connecting portion 2021 is formed by at least partly of the upper surface of utmost point post 202 for assembly personnel can carry out the electricity of second connecting portion 301 and first connecting portion 2021 and connect the operation on the upper portion of casing 1 down. There is little or no need to reserve an operation space for the electrical connection operation of the second connection portion 301 and the first connection portion 2021 by making the bezel short. Therefore, the height difference of each frame of the lower box body 1 can be reduced, and even the height of each frame of the lower box body 1 is equal, so that the overall strength of the lower box body can be improved, and the overall strength of the battery pack is improved.

Therefore, the battery pack 100 of the embodiment of the present invention has the advantages of good overall strength, etc.

Optionally, the upper surface of the pole 202 may be a horizontal plane as a slope. When the upper surface of the pole 202 is a slope, the inclination angle of the upper surface can be set reasonably according to the requirement of the operating space.

Optionally, the first connection portion 2021 is welded to the second connection portion 301. For example, the first connection portion 2021 and the second connection portion 301 are laser-welded.

Of course, in other embodiments, the first connection portion 2021 and the second connection portion 301 may also be electrically connected by a fastener, which may be a bolt, a screw, or the like. For example, the upper surface of the pole 202 is provided with a first connection hole extending in the up-down direction, the busbar 3 is provided with a second connection hole extending in the up-down direction, and the fastener passes through the second connection hole from top to bottom and is connected with the first connection hole, so that the first connection portion 2021 is electrically connected with the second connection portion 301.

Optionally, the busbar 3 may be an aluminum busbar, a copper busbar, or the like.

Alternatively, the material of the pole 202 may be aluminum, aluminum alloy, or copper.

Optionally, as shown in fig. 4 and fig. 14, the lower box 1 includes a frame and a bottom plate 102, the frame and the bottom plate 102 enclose a cell accommodating cavity with an upward opening, and the cell 2 is disposed in the cell accommodating cavity.

In order to make the technical solution of the present application easier to understand, the following further describes the technical solution of the present application by taking, as an example, that the height direction of the battery cell 2 is consistent with the vertical direction, the length direction of the battery cell 2 is consistent with the horizontal direction, and the width direction of the battery cell 2 is consistent with the front-back direction.

For example, as shown in fig. 6, the battery cells 2 extend in the left-right direction, each battery cell 2 has two terminals 202, the two terminals 202 are a positive terminal and a negative terminal, and the two terminals 202 are respectively disposed on the left and right sides of the battery cell 2. The two poles 202 may be made of the same material or different materials.

As shown in fig. 1 to 4, four frames are provided, namely, a left frame 1011, a right frame 1012, a front frame 1013, and a rear frame 1014, and the left frame 1011, the right frame 1012, the front frame 1013, and the rear frame 1014 are provided on the upper side of the base plate 102. The left frame 1011 is disposed on the left side of the right frame 1012, the front frame 1013 is disposed on the front side of the rear frame 1014, and the left frame 1011, the right frame 1012, the front frame 1013, the rear frame 1014 and the bottom plate 102 enclose a cell accommodating cavity.

The busbar 3 can be used for realizing series connection or parallel connection of a plurality of battery cells 2. For example, the positive pole column of one of the two adjacent cells 2 and the negative pole column of the other cell 2 are arranged on the same side, and the same busbar 3 is electrically connected with the positive pole column and the negative pole column of the two cells 2, so that the serial connection of the cells 2 is realized by the busbar 3.

Optionally, the lower box body 1 further includes a beam body, the beam body is disposed in the frame, a plurality of cell accommodating cavities are defined between the beam body, the frame and the bottom plate 102, and each cell accommodating cavity is provided with a cell 2.

For example, as shown in fig. 14, the beam body is a cross beam 103, and the cross beam 103 is connected to the bottom plate 102, a left frame 1011 and a right frame 1012. Two battery cell accommodating cavities are defined among the cross beam 103, the frame and the bottom plate 102, and are respectively a first accommodating cavity 104 and a second accommodating cavity 105. The first receiving chamber 104 is located at the front side of the second receiving chamber 105. Wherein, a first containing cavity 104 is defined among the left frame 1011, the right frame 1012, the front frame 1013 and the bottom plate, and a second containing cavity 105 is defined among the left frame 1011, the right frame 1012, the rear frame 1014 and the bottom plate.

The cross beam 103 can support the left frame 1011 and the right frame 1012, so that the lateral extrusion resistance of the battery pack 100 is improved, and the overall strength of the battery pack 100 is improved.

Of course, in other embodiments, a plurality of beams may be provided, one part of the plurality of beams is a cross beam, another part of the plurality of beams is a longitudinal beam, and the cross beam and the longitudinal beam are arranged in a staggered manner. More than four battery cell accommodating cavities are defined among the cross beam, the longitudinal beam, the frame and the bottom plate.

Optionally, one battery cell 2 may be disposed in each battery cell accommodating cavity, and multiple battery cells 2 may also be disposed.

Optionally, a mounting point is provided on the beam body.

Optionally, the battery pack 100 further includes an upper cover (not shown in the figure), and the upper cover is covered on the lower case 1, so that the upper cover and the lower case 1 enclose a closed space, and the battery core 2 is installed in the closed space.

Optionally, the upper cover and the upper surface of the battery cell 2 are connected by a heat conducting adhesive. The upper cover, the battery cell 2 and the bottom plate 102 form a sandwich structure in the vertical direction.

Optionally, at least one of the bottom plate 102 and the upper cover is a liquid cooling plate, so as to cool and dissipate heat of the battery cell 2.

The liquid cooled plate being at least one of the base plate 102 and the top cover may be understood as: the base plate 102 is a liquid cooled plate; or the upper cover is a liquid cooling plate; alternatively, both the base plate 102 and the top cover are liquid-cooled plates.

Optionally, the beam body is connected with both the upper cover and the bottom plate, and the beam body and the battery cell 2 are equal in height.

Optionally, an avoiding notch for the bus bar 3 to pass through is arranged on the beam body.

For example, the avoidance gap may be an avoidance hole or an avoidance groove, and when the busbar 3 needs to cross the cross beam 103 or the longitudinal beam, a part of the busbar 3 passes through the avoidance gap.

In some embodiments, the pole 202 includes a first section 2022 and a second section 2023, and the first section 2022 is disposed more adjacent to the cell body than the second section 2023 in the length direction of the cell body. The width of the second section 2023 is greater than the width of the first section 2022, and the upper surface of the second section 2023 forms a first connection portion 2021.

For example, as shown in fig. 12, the first section 2022 is provided on the right side of the second section 2023, the width (the dimension in the front-rear direction) of the second section 2023 is larger than the width (the dimension in the front-rear direction) of the first section 2022, and the upper surface of the second section 20322 forms the first connecting portion 2021.

From this, the width of first connecting portion 2021 is great, can increase the area of contact of utmost point post 2 and female row 3, does benefit to and reduces the internal resistance of utmost point post 2 and female 3 junctions of arranging, is favorable to reducing the calorific capacity of utmost point post 2 and female 3 junctions of arranging to be favorable to improving the security of battery package 100. In addition, when the first connection portion 2021 and the second connection portion 301 are welded (e.g., laser welding), the width of the first connection portion 2021 is large, which also facilitates the arrangement of the weld during welding, and facilitates the welding operation of the first connection portion 2021 and the second connection portion 301.

Optionally, the battery cell 2 further includes a cell casing 201 and a cover plate assembly, and the cell body is disposed in the cell casing 201. The cover plate assembly is arranged on the battery cell shell 201 and comprises a cover plate 203 and a pole column 202, one part of the first section 2022 is positioned in the cover plate 203, and the other part of the first section 2022 and the second section 2023 are both positioned outside the cover plate 203.

For example, as shown in fig. 12, a portion of the first section 2022 is located inside the cover plate 203, and another portion of the first section 2022 and the second section 2023 are both located outside the cover plate 203. Such that the second section 2023 and the cover plate 203 are spaced apart.

Optionally, the cover plate 203 and the post 202 may or may not be electrically insulated from each other.

Optionally, the second section 2023 includes a first portion 20221 and a second portion 20222, the first portion 20221 is disposed on an upper side of the second portion 20222, a width of the first portion 20221 is greater than a width of the second portion 20222, a cross section of the second section 2023 is T-shaped, and an upper surface of the first portion 20221 forms the first connection portion 2021.

For example, as shown in fig. 5 to 8 and 12, the projection of the second segment 2023 on a plane perpendicular to the left-right direction is T-shaped. By connecting the first portion 20221 with a larger width to the busbar 3, a larger contact area between the terminal post 2 and the busbar 3 can be ensured. The width of the second portion 20222 is small, so that the weight of the pole cell 2 can be effectively reduced, the weight of the battery pack 100 can be reduced, and the energy density of the battery pack 100 can be improved.

Of course, in other embodiments, lightening holes, lightening grooves, and the like may be provided at the upper and lower portions of the second section 2023, and the weight of the pole cell 2 may be lightened by the lightening holes, the lightening grooves, and the like.

Alternatively, the first portions 20221 of two adjacent battery cells 2 are arranged in a staggered manner in the up-down direction, and the two adjacent second connection portions 301 are arranged in a staggered manner in the up-down direction.

For example, as shown in fig. 5, the first portions 20221 of two adjacent battery cells 2 are higher and lower, and at this time, in the case that the first portions 20221 of two adjacent battery cells 2 do not contact with each other, the width of the first portions 20221 may be greater than the width of the battery cell body (the dimension in the front-back direction), so as to effectively increase the contact area between the terminal posts 2 and the busbar 3. The two second connection portions 301 corresponding to the first connection portion 2021 are also higher and lower.

Of course, in other embodiments, the first portions 20221 of two adjacent battery cells 2 may also have the same height, and in this case, the width of the first portions 20221 should be smaller than the width (the front-back direction dimension) of the battery cell body. At this time, the contact area between the pole 2 and the busbar 3 can be increased by increasing the length of the pole 202 in the left-right direction.

In some embodiments, the busbar 3 has a plurality of widened portions 302, the widened portions 302 correspond to the second connection portions 301 one to one, each widened portion 302 is disposed below the corresponding second connection portion 301, and the longitudinal cross section of the busbar 3 is in an inverted L shape.

For example, as shown in fig. 9, the second connection portion 301 extends in the left-right direction, the widened portion 302 extends in the up-down direction, and a projection of the bus bar 3 on a plane perpendicular to the front-back direction is in an inverted L shape ("L" shape).

Therefore, the widening part 302 arranged below the second connecting part 301 can increase the overall width of the busbar 3, improve the current-carrying strength of the busbar 3, and contribute to further improving the safety of the battery pack 100.

Optionally, a first gap 303 is formed between two adjacent second connecting portions 301.

The first slit 303 may be formed by completely cutting two adjacent second connection portions 301, or may be formed by only partially cutting a boundary between two adjacent second connection portions 301.

For example, as shown in fig. 9, two adjacent second connection portions 301 have a gap in the front-rear direction, and the gap forms a first gap 303, so that the width of the portion of the busbar 3 located between the two adjacent second connection portions 301 is narrower, thereby making the busbar 3 have certain flexibility.

It can be understood that, the upper surfaces of the poles 202 of the two adjacent battery cells 2 have a height tolerance, and the battery pack 100 has working conditions such as vibration during use, and after the second connection portion 301 is electrically connected to the upper surface of the pole 202 (the first connection portion 2021 of the battery cell 2), the busbar 3 can be electrically connected to each first connection portion 2021 through a certain bending deformation.

Optionally, there is a second gap 304 between two adjacent widened portions 302.

The second gap 304 may be formed by completely cutting off the adjacent two widened portions 302, or may be formed by cutting off only a part of the gap at the boundary between the adjacent two widened portions 302.

For example, as shown in fig. 9, the upper ends of two adjacent widened parts 302 have an interval in the front-rear direction, and the interval forms a second gap 304, so that the width of the portion of the busbar 3 located between two adjacent second connecting parts 301 is narrow, and the busbar 3 has certain flexibility.

Thus, after the second connection portion 301 is electrically connected to the upper surface of the terminal 202 (the first connection portion 2021 of the cell 2), the busbar 3 can be electrically connected to each first connection portion 2021 by a certain bending deformation.

Optionally, a first buffer groove is arranged between two adjacent second connecting parts 301.

The first buffer groove can make the busbar 3 have certain flexibility.

Thus, after the second connection portion 301 is electrically connected to the upper surface of the terminal 202 (the first connection portion 2021 of the cell 2), the busbar 3 can be electrically connected to each first connection portion 2021 by a certain bending deformation.

Optionally, the first buffer slot is stamped and formed from a portion of the busbar 3.

Optionally, a second buffer slot 305 is provided between two adjacent widened portions 302.

For example, as shown in fig. 9, a second buffer groove 305 with an opening facing right is provided between two adjacent widened portions 302, and the second buffer groove 305 may provide a certain flexibility to the busbar 3.

Thus, after the second connection portion 301 is electrically connected to the upper surface of the pole 202 (the first connection portion 2021 of the battery cell 2), the bus bar 3 can be electrically connected to the first connection portions 2021 by a certain bending deformation.

Alternatively, the second buffer groove 305 is press-molded from a part of the busbar 3.

Alternatively, the second buffer tank 305 is disposed obliquely. For example, adjacent two widened portions 302 are arranged offset in the left-right direction such that the notch of the second buffer groove 305 is inclined.

In some embodiments, the battery pack 100 further includes a slave control circuit board 4 and a plurality of connection members 5, and the plurality of connection members 5 and the plurality of second connection portions 301 correspond to one another. Each of the connection members 5 has a third connection portion 501 and a fourth connection portion 502, the third connection portion 501 is electrically connected to the corresponding second connection portion 301, and the fourth connection portion 502 is electrically connected to the slave control circuit board 4.

For example, as shown in fig. 10 and 11, extending from the control circuit board 4 in the front-rear direction, a plurality of connecting members 5 are arranged at intervals in the front-rear direction. The third connecting portion 501 is electrically connected with the corresponding second connecting portion 301, and the fourth connecting portion 502 is electrically connected with the slave control circuit board 4, so that the slave control circuit board 4 is electrically connected with the electric core 2, and voltage acquisition of the electric core 2 is realized.

Therefore, the plurality of connecting pieces 5 are used for conveniently realizing the electric connection between the battery core 2 and the slave control circuit board 4, so that the assembly of the battery pack 100 is convenient.

Alternatively, the fourth connecting portion 502 is disposed below the third connecting portion 501, and the longitudinal section of the connecting member 5 is in an inverted L shape.

Therefore, the assembling personnel can electrically connect the third connecting part 501 with the corresponding second connecting part 301 on the upper part of the lower box body 1, so that the height difference of each frame of the lower box body 1 can be reduced, even the frames of the lower box body 1 are set to be equal in height, the overall strength of the lower box body can be improved, and the overall strength of the battery pack can be further improved.

Alternatively, the connecting member 5 may be a nickel plate.

Alternatively, the third connecting portion 501 is welded to the corresponding second connecting portion 301, and the fourth connecting portion 502 is welded to the slave control circuit board 4.

Optionally, a temperature sensor is disposed on the slave control circuit board 4, and the temperature sensor is thermally conducted with the cover plate 203 of the battery cell 2, so as to detect the temperature of the battery cell 2.

Optionally, the battery pack 100 further comprises a plastic bracket. Busbar 3 and slave control circuit board 4 are integrated on the plastic support to form CCS.

The battery core 2 can be assembled into the lower box body 1; then assembling the CCS into the lower box body 1; and then, the pole column 202 and the bus bar 3 are electrically connected, and the bus bar 3 is electrically connected with the slave control circuit board 4. Or, firstly, assembling the electric core 2 into the lower box body 1, and electrically connecting the busbar 3 with the slave control circuit board 4; then, the CCS is assembled into the lower case 1, and the post 202 and the busbar 3 are electrically connected.

The vehicle of the embodiment of the present invention includes the battery pack 100 according to any one of the above embodiments.

The utility model discloses vehicle has advantages such as reliability height.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the present invention and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that various changes, modifications, substitutions and alterations to the above embodiments by those of ordinary skill in the art are intended to be within the scope of the present invention.

Claims (10)

1. A battery pack, comprising:

a lower box body;

the battery cells are arranged in the lower box body and comprise battery cell bodies and polar columns connected with the battery cell bodies, and at least one part of the upper surfaces of the polar columns forms a first connecting part; and

the busbar is provided with a plurality of second connecting parts, the second connecting parts are in one-to-one correspondence with the battery cells, and the second connecting parts are electrically connected with the corresponding first connecting parts of the battery cells.

2. The battery pack of claim 1, wherein the pole comprises a first section and a second section, the first section is disposed closer to the cell body than the second section in a length direction of the cell body, a width of the second section is greater than a width of the first section, and an upper surface of the second section forms the first connection portion.

3. The battery pack of claim 2, wherein the cells further comprise:

the battery cell body is arranged in the battery cell shell; and

the cover plate assembly is arranged on the battery cell shell and comprises a cover plate and a pole, one part of the first section is positioned in the cover plate, and the other part of the first section and the second section are both positioned outside the cover plate.

4. The battery pack according to claim 2, wherein the second segment includes a first portion and a second portion, the first portion is provided on an upper side of the second portion, a width of the first portion is greater than a width of the second portion, a cross section of the second segment has a T-shape, and an upper surface of the first portion forms the first connection portion.

5. The battery pack according to claim 4, wherein the first portions of two adjacent battery cells are arranged in a vertically staggered manner, and two adjacent second connecting portions are arranged in a vertically staggered manner.

6. The battery pack according to any one of claims 1 to 5, wherein the bus bar has a plurality of widened portions, the widened portions and the second connection portions are in one-to-one correspondence, each of the widened portions is provided below the corresponding second connection portion, and a longitudinal cross section of the bus bar has an inverted L shape.

7. The battery pack according to claim 6, wherein a first gap is formed between two adjacent second connecting parts; and/or

A second gap is formed between every two adjacent widened parts; and/or

A first buffer groove is arranged between every two adjacent second connecting parts; and/or

And a second buffer groove is arranged between two adjacent widened parts.

8. The battery pack of any one of claims 1-5, further comprising:

a slave control circuit board; and

the plurality of connecting pieces correspond to the plurality of second connecting parts one by one, each connecting piece is provided with a third connecting part and a fourth connecting part, the third connecting parts are electrically connected with the corresponding second connecting parts, and the fourth connecting parts are electrically connected with the slave control circuit board.

9. The battery pack according to claim 8, wherein the plurality of connecting members are arranged at intervals in a width direction of the cell body; and/or

The fourth connecting part is arranged below the third connecting part, and the longitudinal section of the connecting piece is in an inverted L shape.

10. A vehicle characterized by comprising the battery pack according to any one of claims 1 to 9.

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